Ʌlexandre:
Se você quiser compartilhar alguma coisa comigo ou simplesmente bater um papo, estou esperando :)

The subjunctive future-tense 2nd person singular form of the verb "querer" (i.e. quiser) is not mandatory in the context above. And...whenever you apply this verbal form, you should also conjugate the following related verb in a future tense, provided that the action immediately succeeding the condition established by the word "se", on the case above, is a future action. So the most correct way to say that is:

" Se você quiser compartilhar alguma coisa comigo ou simplesmente bater um papo, estarei esperando :)  "

However, in everyday, spoken language, either forms are used. E.g.:

Se você contar, eu conto  vs  Se você contar, eu contarei

Now, Leonid, this is just a matter of deciding what you are learning Portuguese for. If your intention in learning it is for reading or writting documents, books etc then you should look after the most grammatically correct ways of expression. But if you're just learning it for basic communication and/or curiosity matter, then you shouldn't worry about this.

The way as you first wrote it, Leonid, was absolutely correct (and way more simple than the phrase Alexander suggested) despite missing the graphic accents, which is naturally comprehensible given that your keyboard, I suppose, does not contain those characters.

By now, don't worry about complex verb conjugations. There is always some way to say what you want to say without using them.

Best regards,

Napus.